CALORIMETRIC OBSERVATION OF A STRUCTURAL PHASE-TRANSITION AT ELEVATED-TEMPERATURES IN SINGLE-CRYSTAL C60

被引：11

作者：

FORTUNE, NA ^{[1
]}

MURATA, K ^{[1
]}

IGA, F ^{[1
]}

NISHIHARA, Y ^{[1
]}

KIKUCHI, K ^{[1
]}

SUZUKI, S ^{[1
]}

IKEMOTO, I ^{[1
]}

ACHIBA, Y ^{[1
]}

机构：

[1] TOKYO METROPOLITAN UNIV,HACHIOJI,TOKYO 19203,JAPAN

来源：

PHYSICA C | 1991年 / 185卷

关键词：

D O I：

10.1016/0921-4534(91)92015-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present the first observation of multiple structural phase transitions in single crystal undoped C60. Crystals annealed in He gas at 500 K (225-degrees-C) exhibit transitions at 250 K and 425 K (150-degrees-C). The 250 K transition has been attributed to an orientational ordering of individual C60 molecules in powdered crystal C60. A third (metastable) transition at 185 K in as-grown crystals is eliminated by annealing at temperatures above 425 K. These results have direct relevance to vapor phase doping of alkali metals at elevated temperatures to induce bulk superconductivity in C60.

引用

页码：425 / 426

页数：2

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